QuickBooks Error 3371 occurs when users try to start QuickBooks application. The most important reason behind this error is corrupted license information. To resolve this tricky error users must run QuickBooks Diagnostic Tool. The error pop-ups on the screen in dialogue box along with the message code. To know the detail steps of QuickBooks Error 3371 rectification, users must look for the steps mentioned in the blog or else contact us at our toll-free number (844)-932-1139.